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updated 27 days ago

fshift by Francois Bouffard

Shifts the elements of an array by a (possibly non-integer) given number of elements. (matrices, circular, shift)

fshift.m

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updated 3 months ago

Fourfun by Kristyn McLeod

A system for automatic computations using Fourier expansions (chebfun, fourier)

fourfun

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updated 6 months ago

Simple 2D Fourier by Richard McCulloch

Plotting program for 2D fourier expansions. (fourier, 2d, 2d fourier)

Fourier_2D.m

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updated 6 months ago

Fractional differentiation and integration by George Papazafeiropoulos

The n-th order derivative or integral of a function is calculated through Fourier series expansion. (gauss, legendre, fractional)

Cubic polynomial differintegral

Identity function differintegral

Tabular function differintegral

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updated 8 months ago

Field-shift calculation without aliasing. by Job

Efficient forward Fourier-based calculation of the susceptibility-induced field shift in MRI (mri, magnetic susceptibili..., aliasing)

calculateFieldShift(X_dev, voxelSize)

demonstration.m

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updated 9 months ago

Fourier Series Example by Dimitrios Piretzidis

Fourier series representation of a 3rd degree polynomial function. (fourier, series, polynomial)

fourier_gui(varargin)

plots_gui(varargin)

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updated 2 years ago

3D convolution in the FFT domain by Christopher Coello

Achieve a 3D convolution in the fourrier domain. (convolution, fourier, 3d)

convolution3D_FFTdomain(inVol,inKer)

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updated 2 years ago

Fourier Coefficient Conversion by Sebastian W

Converts Fourier Coefficients from exponential to cos/sin and the other way around. (fourier, transform, coefficient)

FOURIERcossin2exp(a, b)

FOURIERexp2cossin(c)

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updated 2 years ago

finite fourier series by Alok D

finite fourier series (fourier)

finite_fourier_series.m

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updated almost 3 years ago

Live audio stream analyser and voice coach by Steve Lawrence

A program that uses 'analoginput' to create a live audio stream, which is analyzed in real-time. (singing, coach, signal processing)

liveon.m

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updated almost 3 years ago

dft.m by Shubhi Rani

computes 1-D fourier transform (dft, matlab, simulation)

dft.m

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updated 3 years ago

Ecuaciones Diferenciales y de Diferencias by Roberto Herrera

Solución de ecuaciones diferenciales en forma simbólica y de diferencias en gráfica y simbólica (mathematics, fourier, dirac)

ecuadiferedydiferen.m

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updated almost 4 years ago

Signals and Systems Laboratory with MATLAB M-files by Alex Palamides

These are most of the m-files contained in the book Signals and Systems Laboratory with MATLAB (signals, systems, laplace)

[sm,pro]=oper(A,B)

convd(x,n1,h,n2)

det1(A)

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updated 4 years ago

1D Fourier shift by Tim

Shift 1D signals using the Fourier shift theorem. (signal processing, fourier, shift)

FourierShift(x, delta, zero_pad)

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updated 4 years ago

2D Fourier shift by Tim

Cyclically shift a 2D matrix or image using the Fourier shift theorem. (image, shift, fourier)

FourierShift2D(x, delta)

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updated 5 years ago

FFT filter - clean your signals and display results! by Shmuel Ben-Ezra

Perform Fourier transform, filter in frequency domain, reconstruct the signal. (fft, ifft, dft)

fftf(t, x, varargin)

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updated 5 years ago

MGWT by Jesús P. Mena-Chalco

Identification of protein coding regions using the Modified Gabor-wavelet transform. (protein coding region, gene, identification)

MGWT(varargin)

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updated almost 6 years ago

Three Dimensional Analytical Magnetic Resonance Imaging Phantom in the Fourier Domain by Cheng Guan Koay

This software contains 2D and 3D Shepp-Logan phantoms in both the image and Fourier domains. (image generation, shepplogan 3d analyti..., shepplogan 3d analyti...)

SampleTest.m.m

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updated almost 6 years ago

fseriedemo by Matt Fig

Calculates and plots the Fourier Series Approximation to function f. (fourier, series, plot)

fseriesdemo(f,b,NN)

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updated 6 years ago

HarmonicSeries.m by Carlos Adrian Vargas Aguilera

Space-Time series (1D, 2D, or 3D) as the sum of cosines. (spectral analysis, harmonic, cosine)

harmonicseries(AMP,PER,PHA,LEN,DIR,T,X,Y)

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updated 6 years ago

Sawtooth Wave Fourier Series Demo by Kanchi

Sawtooth Wave Fourier Series Demo (spectral analysis, sawtooth, wave)

sawtooth_wave_fourier_series_demo

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updated 6 years ago

Square Wave Fourier Series Demo by Kanchi

Square Wave Fourier Series Demo (spectral analysis, square wave, fourier)

square_wave_fourier_series_demo

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updated 6 years ago

Elliptical Fourier Shape Descriptors GUI by David Thomas

Provides a GUI for the EFSD routines by the same author (measurements, fourier, shape analysis)

fsdv221(varargin)

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updated 7 years ago

Calculate Wigner distribution by Adam Wyatt

Calculates the 2D Wigner distribution of a complex function. (chemistry, physics, wigner function distr...)

mywigner(Ex)

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updated 7 years ago

Split Step Fourier Method by Muddassir Iqbal

Simulate Pulse propagation in Fiber optics (nlse, sssfm, pulse propagation)

split_step_fourier_method.m

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updated 7 years ago

Interactive Fourier Filter (version 1.5) by Tom O'Haver

Interactive Fourier Filter for time-series signals. (filter design, filter analysis, filter)

exp(-((x-pos)./(0.6006.*wid)) .^(2*round(n)));

exp(-((x-pos)./(0.6006.*wid)) .^2);

iffcenter(n,h)

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updated 7 years ago

Sine and cosine integrals on non-uniform grid by Leonid

Calculates integrals f(x)*sin(k*x)*dx and f(x)*cos(k*x)*dx with high precision for any value of k (integration, sine, cosine)

Int=integral_cos(x, f, k)

Int=integral_simpson(x, f)

Int=integral_sin(x, f, k)

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updated 7 years ago

Fast Fourier Transform Algorithm by Farhat Masood

Implementation of FFT without using matlab built-in function of fft. (dsp, fft, open source)

Y=ft2

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updated 7 years ago

FourierTransform2.m by Carlos Adrian Vargas Aguilera

Fourier complex transform of a 2D real field. (spectral analysis, fourier, spectrum)

fouriertransform2.m

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updated 7 years ago

InverseFourierTransform2.m by Carlos Adrian Vargas Aguilera

Inverse Fourier complex transform of a origin-symetrical complex transform (result 2D real field). (spectral analysis, fourier, spectrum)

inversefouriertransform2.m

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updated almost 8 years ago

Singular Fourier-Pade approximation by Toby Driscoll

Circumvention of the Gibbs phenonmenon though Pade approximations with singularities (approximation, interpolation, fourier)

padelog(c,z0)

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updated 8 years ago

Fast Fourier Transform by erinc topdemir

An fft algorithm using radix2. (dsp, fft, fourier)

x=my_fft(y,m)

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updated 8 years ago

Fourier-Motzkin Elimination by Sebastian Siegel

Fourier-Motzkin Elimination of a systen of inequalities (A*x <= b). (linear algebra, fourier, motzkin)

fourmotz(A,b,nvar);

reduce_rows(a);

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updated almost 9 years ago

ORTHPOLYFIT, ORTHPOLYVAL by Ingo Löhken

Direct transform of multivariate series to a polynomial domain by the Gaussian quadrature methods. (approximation, interpolation, orthogonal)

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updated almost 9 years ago

fsa by M MA

Fourier Spectral Analysis (spectral analysis, fourier, fsa)

fsa(x,interval,output,fopen_opt)

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updated almost 10 years ago

Find centroid of a monochrome laserspot within a dark background by Rainer F.

Find centroid of a monochrome laserspot within a dark background using Fourier. (image analysis, centroid, fourier)

FindCentroidLaserSpotUsingFourier(shot)

test.m

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updated 10 years ago

Fourier Series Surface Fitter (FSSF2) by Miltiades Salvanos

gui tool to fit Fourier series surfaces over scatter data. (approximation, interpolation, fourier)

A=fitfourier(data,n,bcx_0,bcx_end,bcy_0,bcy_end)

fssf(varargin)

output=kernel(data,n,series,bcx_0,bcx_end,bcy_0,bcy_end)

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updated 11 years ago

fftd.m by Paul Godfrey

A dimensionless Discrete Fourier Transform program. (spectral analysis, discrete, fourier)

fftd(t)

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updated 11 years ago

fftd by Paul Godfrey

Computes the dimensionless fft. (spectral analysis, fft, fourier)

fftd(t)

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updated 11 years ago

fourier_simple.m by ahmed marmoush

Plot Fourier series. (specialized, plotting, fourier)

fourier_simple.m

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updated almost 12 years ago

ShiftImage by Edward Brian Welch

Shifts an image using the Fourier shift theorem. (approximation, interpolation, image)

RotateImage(Image, deltax, deltay)

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updated 12 years ago

FFT Plot by Bill Higley

A quick-and-dirty FFT Plot (specialized, plotting, fft)

fftplot(in)

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updated almost 13 years ago

RotateImage by Edward Brian Welch

Image rotation performed by 3 separable skews (geometric transformat..., image registration, rotate)

RotateImage(Image, degrees)

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updated 13 years ago

FFT of a 256x256 Matrix by Mark Limber

FFT of a 256x256 Matrix (gallery, fft, 256x256)

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updated 14 years ago

fourier_by_jump.m by Rasmus Post

FOURIER_BY_JUMP is a fourier analysis, especially made for sampled data, but it is not a DFT. (spectral analysis, fourier, sampled data)

[a_0,a_n,b_n]=f(input,max_harmonic,method);

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updated 14 years ago

ffth.m by Paul Godfrey

Half space FFT (spectral analysis, fast, fourier)

ffth(T)

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updated almost 16 years ago

fftmspec.m by Jesus Rojas Zavarce

Module Spectra of the Fourier Transform (spectral analysis, module, spectra)

fftmspec.m

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updated 16 years ago

fourgraph by Yaniv Hollander

Hemo of ploting a fourier series to a given one variable function. (spectral analysis, fourier, plotting)

draw(func,i,h,dx,Xmin,Xmax);

fourgraph()

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